US4181568A - Headbox for a paper machine for the production of a fiber web of at least two plies - Google Patents

Headbox for a paper machine for the production of a fiber web of at least two plies Download PDF

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Publication number
US4181568A
US4181568A US05/911,012 US91101278A US4181568A US 4181568 A US4181568 A US 4181568A US 91101278 A US91101278 A US 91101278A US 4181568 A US4181568 A US 4181568A
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US
United States
Prior art keywords
slice
inlet
headbox
chamber
opening
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US05/911,012
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English (en)
Inventor
Johan v. Pfaler
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Tampella Oy AB
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Tampella Oy AB
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Filing date
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Application filed by Tampella Oy AB filed Critical Tampella Oy AB
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Publication of US4181568A publication Critical patent/US4181568A/en
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/024—Details of the feed chamber
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/026—Details of the turbulence section
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/028—Details of the nozzle section
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00—Complete machines for making continuous webs of paper
    • D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type
    • D21F9/006—Complete machines for making continuous webs of paper of the twin-wire type paper or board consisting of two or more layers

Definitions

  • This invention relates to a headbox for a paper machine for the production of a two- or multi-ply fiber web, which headbox forms a slice opening extending across the wires of the paper machine, and is divided by means of at least one wall into separate slice channels which are connected to separate sources of fiber suspensions for supplying separate fiber suspensions in streams with the width of wire upon the wires, and the upstream end of the division wall is joined to the headbox.
  • This kind of headbox is used in the production of multi-ply webs, especially paper webs by means of one headbox by bringing separate streams of fiber suspensions one upon the other between two wires.
  • each of the division walls consists of a rigid plate, the upstream end of which is pivotably mounted to the inlet of the headbox by means of a joint stationarily arranged in the inlet.
  • the division walls form separate slice channels which supply the different fiber suspensions as separate streams to the slice opening of a slice chamber forming an extension of the inlet.
  • This kind of headbox is usually designed for certain volume flows of fiber suspensions passing through the individual slice channels per time unit. If a deviation from these initial operating characteristics takes place, for example due to a change in the basis weight or consistency etc., a pressure difference over the division wall or walls is caused, which tends to move the walls from their original positions. Because the upstream ends of the walls are fastened to the inlet by means of stationary joints and because only the downstream ends of the walls at the slice opening can thus move in relation to each other and to the walls of the slice chamber, speed differences arise in the slice opening between the different suspension streams flowing out from the slice channels respectively. These speed differences make the fiber streams mix with each other and thus break the desired structure of the web.
  • a headbox which consists of two parts; an inlet and a slice chamber forming an extension of the inlet.
  • the inlet is divided into separate channels by means of stationary, rigid partitions, while the slice chamber is divided into separate slice channels by means of flexible walls forming extensions of the stationary partitions.
  • the upstream ends of the walls in the slice chamber are stationary, but otherwise the walls can float freely in the slice chamber.
  • the object of this invention is to obtain a headbox which can be used with varied rates of volume flow without causing the disadvantages described above. According to the invention this object is reached with a headbox characterized in that the joint for each division wall is adjustable across the flow direction of the fiber suspensions and in that the headbox is equipped with adjusting means for displacing said joint.
  • the headbox it is possible to displace the joint of each wall in a direction perpendicular to the direction of the flow of the fiber suspensions and substantially perpendicular to the plane of the wires so that the ratio of the cross sectional areas of the different slice channels at the level of the joint of the walls is the same as the ratio of the stock volumes flowing through respective slice channels per time unit.
  • the joint of the wall it is always possible to displace the joint of the wall to a point in the headbox which is theoretically correct in view of the relation between the desired volumes of the stocks per time unit.
  • FIG. 1 is a diagrammatic illustration of a paper machine equipped with a headbox according to the present invention.
  • FIG. 2 is an enlarged side view of the headbox.
  • FIG. 3 is a sectional view of the headbox along line III--III in FIG. 2.
  • FIG. 4 is a sectional view of the headbox along line IV--IV in FIG. 3.
  • FIG. 5 is a side view of a second embodiment of the headbox partly sectioned.
  • FIG. 6 is a sectional view of the headbox along line VI--VI in FIG. 5.
  • FIG. 7 is a side view of a third embodiment of the headbox.
  • FIG. 8 is a sectional view of the headbox along line VIII--VIII in FIG. 7.
  • FIG. 9 is still another embodiment of the wall construction of the headbox.
  • FIG. 10 is a sectional view of a modified wall construction.
  • FIG. 1 two forming wires 1 and 2 are passed over rolls 3,4,5 to form an evenly converging forming zone 6.
  • dewatering boxes 7 are provided in the forming zone.
  • the dewatering is caused by pressure difference over the wire and it is controlled by individually adjustable throttle valves 8.
  • a headbox 9 is provided which is equipped with several, in this case three, manifolds 10A, 10B, 10C to supply separate fiber suspensions into the headbox.
  • the separate fiber suspensions flow from the headbox between the wires 1,2 and further through the forming zone 6 in which the fiber suspension is dewatered.
  • the sheet 11 thus formed runs between the wires over the carrying roll 5 and, supported by the wire 1, in a known manner further to the press section.
  • the wires 1 and 2 are returned back to the rolls 3,4 by stretcher, carrying and guide rolls.
  • the headbox 9 comprises an inlet 9A and a narrowing slice chamber 9B connected thereto, which slice chamber ends in a narrow slice opening 12.
  • the slice opening is located crosswise in relation to the movement direction A of the wires 1,2 and is substantially as wide as the wires.
  • the inlet and the slice chamber are divided by means of two partitions 13 and two walls 14 respectively in three separate slice channels 15.
  • the said manifolds 10A, 10B, 10C thus end in their respective slice channels as shown in FIG. 3.
  • Each platelike partition 13 is pivotably mounted to the inlet 9A by means of a joint 16, which is stationary positioned in the upstream end of the inlet.
  • the pivot shaft 16A of the joint 16 is parallel to the slice opening 12 so that the partition can turn around the joint 16 as shown by the arrow B.
  • Each division wall 14 is pivotably mounted to the respective partition 13 by means of a joint 17, the pivot shaft 17A of which is parallel to the above-mentioned joint 16 and slice opening 12.
  • the headbox is equipped with adjusting means 18, which is coupled to the shaft 16A of one of the partitions 13 in order to turn said shaft and the partition supported by said shaft.
  • the other partition 13 is provided with corresponding adjusting means.
  • the adjusting means consists, for example, of a worm gear equipped with a hand wheel, as illustrated in FIGS. 2 and 4.
  • the size of the slice opening 12 of the slice chamber can be controlled by adjustment means 19.
  • the different fiber suspensions are pumped into the manifolds 10A-10C of the headbox, whereby each fiber suspension is evenly divided over the whole width of the machine. From the manifolds the fiber suspensions flow into the slice channels 15 of the inlet 9A and possible lumps of fibers are broken by shear forces occuring in the slice channels so that the stock is homogenized. From the inlet the fiber suspensions flow in separate streams through the slice chamber into the slice opening 12 and further, carried by the wires 1,2, through the forming zone 6 in order to form a multi-ply sheet 11.
  • the pressures of the streams in the slice channels 15 and correspondingly also the flow speeds change.
  • the position of the joints 17 at the upstream ends of the division walls 14 is changed in a direction perpendicular to the flow direction D of the fiber suspensions i.e. in the thickness direction of the fiber suspension stream, so that the mutual relation of the flow volumes per time unit is the same as the mutual relation of the cross sectional areas of the slice channels 15 at the level of the joints 17.
  • FIGS. 5 and 6 show an embodiment in which the partitions 23 in the inlet 29A of the headbox 29 are stationary. Also here the walls 24 defining the slice channels 25 are fastened by joints 27, which are positioned substantially on the extensions of the partitions, at the level between the inlet 29A and the slice chamber 29B.
  • the shafts 27 of the joints of the walls are fastened to supports 21 which are supported by two screws 22 arranged at a distance from each other.
  • the screws are positioned at right angles to the flow direction D of the fiber suspensions and the shaft 27A.
  • the screws are rotatably supported by a hole plate 26 and coupled to adjusting elements 28 for rotating the screws.
  • the screws are further coupled to supports 21 so that the joints 27 of the division walls can be displaced in the direction of the screws as indicated by the arrows B in order to make the slice channels broader or narrower.
  • the division walls can freely pivot in the slice chamber around their joints 27 as indicated by the arrows C.
  • FIGS. 7 and 8 show an embodiment in which the joints 37 of the division walls 34 are located in the upstream section of the inlet 39A of the headbox 39.
  • the construction of the joints and the adjusting means are the same as shown in FIGS. 5 and 6; therefore the corresponding components are also referred to by the same reference numbers, raised with 10.
  • FIG. 9 illustrates an embodiment of the invention in which the joints 47 of the division walls 44 are rigid.
  • the walls are rigidly supported by screws 42 which are rotatably mounted in a hole plate 46 and are positioned at right angles to the surface of the walls.
  • the screws are in thread engagement with the walls and are rotatable by adjusting means 48 and serve thus as guide bars for the walls.
  • the walls can be displaced on these guide bars at right angles to the flow direction D of the fiber suspensions.
  • the joint construction according to FIG. 9 is applicable both in a headbox in which the joints of the walls are located at the level between the inlet and the slice chamber (headbox 29 in FIG. 6), and in a headbox, in which the joints of the walls are located in the upstream section of the inlet (headbox 39 in FIG. 8).
  • the division wall 44 consists of two parts; a rigid plate 44A at the upstream and a flexible extension 44B attached at one end rigidly to the downstream end of the plate 44A.
  • Each of the two parts of the division wall 54 can also consist of rigid plates 54A, 54B which are articulated to each other by means of a joint 58.

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US05/911,012 1977-07-13 1978-05-30 Headbox for a paper machine for the production of a fiber web of at least two plies Expired - Lifetime US4181568A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI772184 1977-07-13
FI772184A FI58364C (fi) 1977-07-13 1977-07-13 Matningsanordning foer en banformningsmaskin foer framstaellning av en tvao- eller flerskiktig fiberbana

Publications (1)

Publication Number Publication Date
US4181568A true US4181568A (en) 1980-01-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
US05/911,012 Expired - Lifetime US4181568A (en) 1977-07-13 1978-05-30 Headbox for a paper machine for the production of a fiber web of at least two plies

Country Status (8)

Country Link
US (1) US4181568A (fi)
JP (1) JPS5418906A (fi)
BR (1) BR7804504A (fi)
CA (1) CA1066934A (fi)
DE (1) DE2824608C2 (fi)
FI (1) FI58364C (fi)
GB (1) GB1597809A (fi)
SE (1) SE420744B (fi)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3010730A1 (de) * 1980-03-20 1981-09-24 J.M. Voith Gmbh, 7920 Heidenheim Stoffauflauf fuer eine papiermaschine
DE3107926A1 (de) * 1981-03-02 1982-11-04 Escher Wyss Gmbh, 7980 Ravensburg Verfahren zum ausbilden einer mehrlagigen papierbahn in einem doppelsiebformer und doppelsiebformer zur durchfuehrung des verfahrens
US4358342A (en) * 1981-01-19 1982-11-09 Kimberly-Clark Corporation Papermaking headbox having rigid lips and actvating means
US4381219A (en) * 1981-05-14 1983-04-26 Escher Wyss Gmbh Headbox arrangement for a papermaking machine
US4543162A (en) * 1982-07-20 1985-09-24 Escher Wyss Limited Multi-ply headbox having adjustable outlet slices
US4574033A (en) * 1982-07-06 1986-03-04 Kmw Aktiebolag Method and apparatus for delivering a multilayer jet of stock to a forming surface in a papermaking machine
US4604164A (en) * 1985-01-30 1986-08-05 Mitsubishi Jukogyo Kabushiki Kaisha Flow restraining elements in the headbox of a paper machine
US4812209A (en) * 1986-03-06 1989-03-14 J. M. Voith Gmbh Headbox for the production of fibrous stock webs
US4824524A (en) * 1987-02-02 1989-04-25 Sulzer Escher Wyss Gmbh Multi-ply headbox for a papermaking machine
US4891100A (en) * 1988-03-09 1990-01-02 Sulzer-Escher Wyss Gmbh Apparatus for retaining a partition foil
US5074965A (en) * 1989-12-22 1991-12-24 Valmet-Karhula Inc. Single-layer or multi-layer headbox for wide flow range with adjustable bypass flow guide
US5431785A (en) * 1992-07-31 1995-07-11 Sulzer-Escher Wyss Gmbh Multilayer head box for a paper machine
US5545294A (en) * 1993-09-13 1996-08-13 Valmet-Karlstad Ab Multilayer headbox
US5569360A (en) * 1993-10-29 1996-10-29 Valmet Corporation Multi-layer headbox
US5622603A (en) * 1993-03-06 1997-04-22 J.M. Voith Gmbh Influencing the jet velocity in the multilayer headbox
US5639352A (en) * 1993-09-03 1997-06-17 J.M. Voith Gmbh Headbox lamellae and method for reducing turbulence thereabout
US5849159A (en) * 1994-04-29 1998-12-15 Voith Sulzer Papiermaschinen Gmbh Multi-layer headbox with plastic and metal divider plate
US6059929A (en) * 1996-06-17 2000-05-09 Voith Sulzer Papiermaschinen Gmbh Three-layer headbox
US6139687A (en) * 1997-12-15 2000-10-31 Kimberly Clark Worldwide Cross-machine direction stiffened dividers for a papermaking headbox
US6238518B1 (en) 1999-03-02 2001-05-29 Ahlstrom Paper Group Oy Foam process for producing multi-layered webs
US6368464B1 (en) * 1998-02-05 2002-04-09 Andritz-Patentvenwaltungs-Gesellschaft M.B.H. Device for feeding a pulp suspension to a dewatering installation
US6491793B2 (en) * 2000-11-29 2002-12-10 Metso Paper, Inc. Arrangement for fastening a turbulence vane to a headbox
US20030056924A1 (en) * 2000-05-10 2003-03-27 Metso Paper Karlstad Ab Headbox and arrangement and method for mounting a vane thereof
US20090020251A1 (en) * 2001-12-05 2009-01-22 Daniel Soderberg Machine for forming a fibrous web

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT361772B (de) * 1977-12-13 1981-03-25 Escher Wyss Gmbh Stoffauflauf fuer papiermaschinen
AT376722B (de) * 1983-02-09 1984-12-27 Andritz Ag Maschf Entwaesserungsmaschine fuer zellstoff od. dgl. fasermaterial
DE19806402A1 (de) * 1998-02-17 1999-08-19 Voith Sulzer Papiertech Patent Verfahren zum Zusammenführen zweier Suspensionsschichten sowie Eindickvorrichtung
DE10213853A1 (de) * 2002-03-27 2003-10-16 Voith Paper Patent Gmbh Mehrschicht-Stoffauflauf

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823062A (en) * 1972-02-28 1974-07-09 Int Paper Co Twin-wire papermaking employing stabilized stock flow and water filled seal(drainage)boxes
US3853697A (en) * 1973-03-08 1974-12-10 Beloit Corp Papermaking machine headbox with an upwardly inclined slice chamber portion, an arcuate portion, and a downwardly inclined portion and containing flexible trailing members
US3923593A (en) * 1971-12-03 1975-12-02 Beloit Corp Multiple ply web former with divided slice chamber
US4081321A (en) * 1975-11-06 1978-03-28 J. M. Voith Gmbh Movable deckle within headbox outlet

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3255074A (en) * 1964-04-03 1966-06-07 Beloit Corp Headbox for paper-making machine
DE6606625U (de) * 1965-09-03 1970-11-12 Voith J Gmbh Siebpartie einer langsiebpapiermaschine mit blattbildung unter luftabschluss
DE1461179A1 (de) * 1965-09-03 1969-10-02 Voith Gmbh J M Siebpartie einer Langsiebpapiermaschine mit Blattbildung unter Luftabschluss
US3839143A (en) * 1972-06-08 1974-10-01 Beloit Corp Multi-ply two wire former wherein multiple headboxes are used and inflatable air bellows provide adjustments therebetween
US3888729A (en) * 1972-11-06 1975-06-10 Joseph D Parker Papermaking machine headbox slice chamber containing pivotable thin rigid plates with flexible elements attached thereto
FI379674A (fi) * 1974-01-17 1975-07-18 Beloit Corp

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3923593A (en) * 1971-12-03 1975-12-02 Beloit Corp Multiple ply web former with divided slice chamber
US3823062A (en) * 1972-02-28 1974-07-09 Int Paper Co Twin-wire papermaking employing stabilized stock flow and water filled seal(drainage)boxes
US3853697A (en) * 1973-03-08 1974-12-10 Beloit Corp Papermaking machine headbox with an upwardly inclined slice chamber portion, an arcuate portion, and a downwardly inclined portion and containing flexible trailing members
US4081321A (en) * 1975-11-06 1978-03-28 J. M. Voith Gmbh Movable deckle within headbox outlet

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3010730A1 (de) * 1980-03-20 1981-09-24 J.M. Voith Gmbh, 7920 Heidenheim Stoffauflauf fuer eine papiermaschine
US4372816A (en) * 1980-03-20 1983-02-08 J. M. Voith Gmbh Head box for a paper making machine
US4358342A (en) * 1981-01-19 1982-11-09 Kimberly-Clark Corporation Papermaking headbox having rigid lips and actvating means
DE3107926A1 (de) * 1981-03-02 1982-11-04 Escher Wyss Gmbh, 7980 Ravensburg Verfahren zum ausbilden einer mehrlagigen papierbahn in einem doppelsiebformer und doppelsiebformer zur durchfuehrung des verfahrens
US4381219A (en) * 1981-05-14 1983-04-26 Escher Wyss Gmbh Headbox arrangement for a papermaking machine
US4574033A (en) * 1982-07-06 1986-03-04 Kmw Aktiebolag Method and apparatus for delivering a multilayer jet of stock to a forming surface in a papermaking machine
US4543162A (en) * 1982-07-20 1985-09-24 Escher Wyss Limited Multi-ply headbox having adjustable outlet slices
US4604164A (en) * 1985-01-30 1986-08-05 Mitsubishi Jukogyo Kabushiki Kaisha Flow restraining elements in the headbox of a paper machine
US4812209A (en) * 1986-03-06 1989-03-14 J. M. Voith Gmbh Headbox for the production of fibrous stock webs
US4824524A (en) * 1987-02-02 1989-04-25 Sulzer Escher Wyss Gmbh Multi-ply headbox for a papermaking machine
US4891100A (en) * 1988-03-09 1990-01-02 Sulzer-Escher Wyss Gmbh Apparatus for retaining a partition foil
US5074965A (en) * 1989-12-22 1991-12-24 Valmet-Karhula Inc. Single-layer or multi-layer headbox for wide flow range with adjustable bypass flow guide
US5431785A (en) * 1992-07-31 1995-07-11 Sulzer-Escher Wyss Gmbh Multilayer head box for a paper machine
US5622603A (en) * 1993-03-06 1997-04-22 J.M. Voith Gmbh Influencing the jet velocity in the multilayer headbox
US5639352A (en) * 1993-09-03 1997-06-17 J.M. Voith Gmbh Headbox lamellae and method for reducing turbulence thereabout
US5545294A (en) * 1993-09-13 1996-08-13 Valmet-Karlstad Ab Multilayer headbox
US5569360A (en) * 1993-10-29 1996-10-29 Valmet Corporation Multi-layer headbox
US5849159A (en) * 1994-04-29 1998-12-15 Voith Sulzer Papiermaschinen Gmbh Multi-layer headbox with plastic and metal divider plate
US6059929A (en) * 1996-06-17 2000-05-09 Voith Sulzer Papiermaschinen Gmbh Three-layer headbox
US6139687A (en) * 1997-12-15 2000-10-31 Kimberly Clark Worldwide Cross-machine direction stiffened dividers for a papermaking headbox
US6146501A (en) * 1997-12-15 2000-11-14 Kimberly Clark Worldwide Cross-machine direction stiffened dividers for a papermaking headbox
US6368464B1 (en) * 1998-02-05 2002-04-09 Andritz-Patentvenwaltungs-Gesellschaft M.B.H. Device for feeding a pulp suspension to a dewatering installation
US6238518B1 (en) 1999-03-02 2001-05-29 Ahlstrom Paper Group Oy Foam process for producing multi-layered webs
US6503372B1 (en) 1999-03-02 2003-01-07 Ahlstrom Glassfibre Oy Twin wire former assembly
US20030056924A1 (en) * 2000-05-10 2003-03-27 Metso Paper Karlstad Ab Headbox and arrangement and method for mounting a vane thereof
US6736938B2 (en) * 2000-05-10 2004-05-18 Metso Paper Karlstad Ab Headbox and arrangement and method for mounting a vane thereof
US6491793B2 (en) * 2000-11-29 2002-12-10 Metso Paper, Inc. Arrangement for fastening a turbulence vane to a headbox
US20090020251A1 (en) * 2001-12-05 2009-01-22 Daniel Soderberg Machine for forming a fibrous web

Also Published As

Publication number Publication date
DE2824608A1 (de) 1979-01-25
SE7807535L (sv) 1979-01-14
FI58364B (fi) 1980-09-30
BR7804504A (pt) 1979-03-06
CA1066934A (en) 1979-11-27
DE2824608C2 (de) 1986-08-07
JPS5418906A (en) 1979-02-13
GB1597809A (en) 1981-09-09
FI772184A (fi) 1979-01-14
JPS563959B2 (fi) 1981-01-28
FI58364C (fi) 1981-01-12
SE420744B (sv) 1981-10-26

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